Abstract
Behavioral variation or Personality difference between individuals has been a hot and debated topic for many years now. Do behavioral studies carried out under simplified laboratory conditions really tell us anything about ecological and evolutionary aspects of inter-individual variation in behavior? Here we combine laboratory measures of individual behavior of brown trout parr with pit-tag telemetry estimating movement patterns in summer in their natural stream environment. Our data suggests that Lab-scored activity predicted dispersal distance and activity levels in the wild. However, our data also suggest that more active individuals are more sensitive to deviations from optimal environmental conditions and that increased habitat complexity may allow these strategies to coexist.